A wild Fermat appears (again)! It's super effective (still) against the encryption keys of some devices (printers). Such cryptography was supposed to be unbreakable - but for that software/hardware must be reliable. So a technique from 1643 works well. This flaw affects Fujifilm and Canon. Vendors know and issued firmware updates. Very nice demonstration, though I would not trust a printer with security, anyway... https://eprint.iacr.org/2023/026.pdf